The worst of the Manhattan Project leaks | Restricted Data

Secrets of the Manhattan Project, Part 2 - Explore Oak …

The Manhattan Project was a secret military project created in 1942 to produce the first US nuclear weapon. Fears that Nazi Germany would build and use a nuclear weapon during World War II triggered the start of the Manhattan Project, which was originally based in Manhattan, New York.

Narratives of Manhattan Project secrecy | Restricted Data

The United States in late 1941 established a secret program, which came to be known as the Manhattan Project, to develop an atomic bomb, a powerful explosive nuclear weapon. The aim of the project, directed by physicist J. Robert Oppenheimer, was to build an atom bomb before Germany did.

US physicist Robert Oppenheimer and General Leslie R. Groves served as directors of this project, which recruited some of the best US scientists, engineers and mathematicians. A number of European scientists, including Albert Einstein, Enrico Fermi, and Leo Szilard, also participated in the Manhattan Project.

The Manhattan Project and the atomic bomb - Khan Academy

On July 4, 1945, Groves wrote to Lord Cherwell, Winston Churchill’s science advisor. - The first version ofSzilard’s petition inspired a similar petition at the Manhattan Project laboratory at Oak Ridge, Tennessee.

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This report by Manhattan Project Chief of Medical Section Stafford Warren shows that radioactive fallout from the test was an important concern.- Even 32 kilometers (20 miles) away, scientists felt the heat of the explosion on exposed skin.

Virtual tour showcases five secret Manhattan Project ..

Declassified eyewitness accounts of the Trinity test by Luis Alvarez, Enrico Fermi, Philip Morrison, Robert Serber, Victor Weisskopf, and others. - Leo Szilard, and 69 co-signers at the Manhattan Project “Metallurgical Laboratory” in Chicago, petitioned the President of the United States.

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For centuries, the Hanford area bordering the Columbia River was home to several tribes of Native Americans. Remnants, artifacts, and burial sites associated with historical Native American activity are found throughout the Site and are protected by law. The mid-1800’s brought pioneers and settlers to the mid-Columbia. The small towns of White Bluffs and Hanford sprang up to support the farms and ranches of early residents. When the War Department decided to locate portions of the Manhattan Project in this part of Washington, it also decided that work to develop atomic weapons had to be done in secret. Subsequently, in early 1943, all of the residents of White Bluffs and Hanford were told to evacuate their homes and abandon their farms, and were given just 30 days and a small amount of money to do so.

Under the auspices of the Manhattan Project, three main research and production facilities were established at Oak Ridge, Tennessee; at Hanford, Washington; and at Los Alamos, New Mexico. The Oak Ridge Laboratories provided uranium-235 and Hanford produced weapons-grade plutonium. The Los Alamos Laboratory became the site for assembling nuclear weapons.

Los Alamos produced four weapons, two of which, Little Boy and Fat Man, were used against Japan in August 1945. The Manhattan Project officially ended in 1946 when it became part of the Atomic Energy Commission (AEC).

After this milestone, funds were allocated more freely, and the project advanced at breakneck speed. Nuclear facilities were built at Oak Ridge, Tennessee and Hanford, Washington. The main assembly plant was built at . was put in charge of putting the pieces together at Los Alamos. After the final bill was tallied, nearly $2 billion had been spent on research and development of the atomic bomb. The Manhattan Project employed over 120,000 Americans.

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Secrecy was paramount. Neither the Germans nor the Japanese could learn of the project. Roosevelt and Churchill also agreed that the Stalin would be kept in the dark. Consequently, there was no public awareness or debate. Keeping 120,000 people quiet would be impossible; therefore only a small privileged cadre of inner scientists and officials knew about the atomic bomb's development. In fact, Vice-President Truman had never heard of the Manhattan Project until he became President Truman.

In 1942, as part of the Manhattan Project, the U.S

By the summer of 1945, Oppenheimer was ready to test the first bomb. On July 16, 1945, at near , scientists of the Manhattan Project readied themselves to watch the detonation of the world's first atomic bomb. The device was affixed to a 100-foot tower and discharged just before dawn. No one was properly prepared for the result.